Optical layout of PGx11 units consists of Synchronously pumped Optical Parametric Oscillator (SOPO) and Optical Parametric Amplifier (OPA). SOPO is pumped by a train of pulses at approx. 87 MHz pulse repetition rate. The output from SOPO consists of a train of pulses with excellent spatial and spectral characteristics, determined by the SOPO cavity parameters.

OPA is pumped by a single pulse temporally overlapped with SOPO output. After amplification at SOPO resonating wavelength, the PGx11 output represents a high intensity single pulse on top of a low-intensity train, while in all other spectral ranges (idler for PG411 and PG711, signal for PG511, also DFG stages) only a single high intensity pulse is present.

Three models designed for pumping by up to the 3rd harmonic of Nd:YAG laser are available.

PG411 model has a tuning range from 420 to 2300 nm and is optimized for providing highest pulse energy in the visible part of the spectrum. When combined with an optional Second Harmonic Generator (SHG) and Sum Frequency Generator (-DUV), it offers the widest possible tuning range – from 193 to 2300 nm.

PG511 model has a tuning range from 725 to 2000 nm and highest pulse energy in near-IR spectral range. With an optional Difference Frequency Generator (DFG) the tuning range can be extended into the 2300 – 10000 nm range. PG411 and PG511 models are designed to be pumped by PL2250 series lasers with a 10 Hz pulse repetition rate.

PG711 model has 1 kHz pulse repetition rate and uses DPSS mode‑locked laser of the PL2210 series for pumping. When pumped with pulses of 90 ps duration, linewidths of less than 1 cm⁻¹ were measured in the spectral range up to 16 000 nm, which makes this device an excellent choice for time-resolved or nonlinear infrared spectroscopy.

For customer convenience the system can be controlled using a user-friendly remote control pad or through USB interface (RS232 is optional) from a personal computer (PC) using supplied LabView™ drivers. Available standard models are summarized in a specification sheet. Please inquire for custom-built versions.

Tab 2

Specifications 1)

Model

PG411

PG411-SH

PG411-SH-DUV

PG511-DFG

PG711

PG711-DFG

OPG specifications

Output wavelength tuning range

SH, DUV

-

210-420 nm

193-420 nm

-

-

-

Signal

420-709 nm

725-1000 nm

1550-2020 nm

Idler

710-2300 nm

1140-2000 nm

2250-3350 nm

DFG

-

2300-10000 nm

-

3350-16000 nm

Output pulse energy 2)

SH, DUV

-

100 µJ3)

50 µJ3)

-

-

Signal

700µJ

700µJ

500µJ

Idler 4)

250µJ

250µJ

100µJ

DFG

-

-

-

-

10µJ 5)

Pulse repetition rate

10 Hz

10 Hz

1000 Hz

Linewidth

< 2 cm-1 6)

<2 cm-1

< 0.5 cm-1

Typical pulse duration 7)

15 ps

20 ps

70 ps

Scanning step, nm

SH, DUV

-

0.01 nm

-

-

-

Signal

0.02 nm

0.02 nm

0.02 nm

Idler

0.1 nm

0.1 nm

0.1 nm

DFG

-

-

-

-

-

1 nm

Pulse contrast 8)

500:1

500:1

106:1

Typical beam diameter 9)

~ 4 mm

~ 4 mm

~ 3 mm

Beam divergence 10)

< 2 mrad

Beam polarization 10)

SH, DUV

-

vertical

-

-

Signal

horizontal

vertical

horizontal

Idler

vertical

horizontal

vertical

DFG

-

horizontal

-

horizontal

Pump laser requirements

Recommended pump source

PL2251A + APL + H411

PL2251A + APL + H511

PL2210B-TR

PL2210B-TR

Min. pump energy or power11)

at 1064 nm

-

2 mJ

(10 mJ)

5W (2,5 mJ)

at 532 nm

-

5 mJ

-

at 355 nm

5 mJ (8 mJ)

-

-

Pulse duration 12)

30 ps

30 ps

90 ps

Bream polarization at pump wavelength

vertical

horizontal

horizontal

Beam size 13)

7 mm

7 mm

2.5 mm

Beam divergence

< 1 mrad

Beam profile

homogeneous, without hot spots

Physical characteristics

Size (WxLxH)

456x1026x273 mm

456x1226x273 mm

456x1026x273 mm

456x1226x273 mm

Operating requirements

Room temperature

15-30 °C

Room temperature stability

± 2 °C

Mains voltage

90-240 V single phase, 47-63 Hz

Power consumption

< 300 W

1) Due to continuous improvement, all speciications are subject to change without notice. For latest product information please visit EKSPLA. Parameters marked typical are not speciications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise, all speciications are measured at 450 nm for PG411 units, 800 nm for PG511 units, and 1620 nm for PG711 units.

2) Pulse energies are speciied at selected wavelengths. See typical tuning curves for pulse energies at other wavelengths.